Benefits Our Gentlest cleaning experience: Inspired by professional dental tools, the Sensi UltraThin toothbrush head is designed in a round petal shape with soft UltraThin bristles to give you the Gentlest Oral-B brushing experience. Round Head Cleans Better: Oral-B’s round head contours to surround each tooth for cleaner teeth and healthier gums. Designed with Dentists: Round head with a combination of ultrathin and regular bristles that are Gentle on gums, but tough on plaque. New Brush Head After Three Months: Dentists recommend replacing your toothbrush every three months, or sooner if bristles are faded and worn. Oral-B replacement toothbrush heads feature indicator bristles that fade halfway to help remind you when to replace your toothbrush head to maintain a superior clean Brush Heads Designed with Dentists: Oral-B brush refills are designed to perfectly fit your toothbrush and come with specialised features for great results. These features include end rounding to be Gentle on gums, angled bristles to clean in-between teeth, and UltraThin bristles for extra Gentle cleaning. Perfectly Suitable for Junior 6+ Years Old Number One Dentist Recommended: Oral-B is not only designed with dentists; it’s also the number one toothbrush brand recommended by dentists worldwide. Discover for yourself the next level of oral care by Oral-B. Oral Hygiene - Toothbrushes